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Glaciers

Glaciers are large, dynamic bodies of ice that form over long periods of time when snow accumulation exceeds ice ablation. They are among the most significant forces shaping Earth's landscape over long time scales. Glaciers are currently found at Earth's poles and in mid-latitude and equatorial mountains.

1,124 Questions

How have glaciers changed earth?

Glaciers have significantly shaped Earth's landscape through processes like erosion and deposition. As they advance and retreat, they carve valleys, create fjords, and form landforms such as moraines and drumlins. Additionally, glaciers store vast amounts of freshwater, influencing sea levels and ecosystems. Their melting due to climate change is also contributing to rising sea levels and altering habitats worldwide.

What is the percentage of earths water is stored inn polar ice caps glaciers and permanent snow?

Approximately 68.7% of Earth's freshwater is stored in polar ice caps, glaciers, and permanent snow. This accounts for about 1.7% of the total water on the planet, as the majority of Earth's water (about 97.5%) is saltwater found in oceans. The remaining freshwater is primarily found in lakes, rivers, and underground aquifers.

Where are three locations where glaciers are?

Three notable locations where glaciers can be found are Antarctica, which holds the largest ice sheet in the world; Greenland, home to the Greenland Ice Sheet; and the Himalayas, where the vast number of glaciers, including the Siachen and Gangotri glaciers, are crucial for the region's water supply. These glaciers play a vital role in Earth's climate and hydrology.

What glaciers are called thick rivers of ice?

Glaciers are often referred to as "thick rivers of ice" because they flow slowly under their own weight, much like a river flows, but in a solid state. This movement occurs due to gravity and the internal deformation of ice, allowing glaciers to carve landscapes over time. They form from accumulated snowfall that compresses into ice, creating vast, thick masses that can extend for miles.

What two process transitions cloud to glacier?

The two process transitions from cloud to glacier are condensation and deposition. In condensation, water vapor in the atmosphere cools and transforms into liquid droplets, forming clouds. When temperatures drop further, especially at high altitudes, water vapor can undergo deposition, directly converting into ice crystals that accumulate, eventually forming glaciers as these crystals compact and transform over time.

How glaciers are important for environment?

Glaciers play a crucial role in the environment by acting as a freshwater reservoir, supplying water to rivers and ecosystems during warmer months. They help regulate global sea levels by storing large amounts of ice; as they melt, they can contribute to rising sea levels. Additionally, glaciers influence local climates and weather patterns, affecting biodiversity and habitats. Their presence also reflects climate change, as their retreat signals shifts in environmental health.

Where does glacial till collects at glacier?

Glacial till collects at the base and along the sides of a glacier, where it is deposited as the glacier moves and melts. This unsorted sediment consists of a mix of clay, silt, sand, gravel, and boulders. When the glacier retreats, it leaves behind this till, forming various landforms such as moraines, that are characterized by their heterogeneous composition. Additionally, till can also accumulate in front of the glacier, forming features like terminal moraines.

What kind of succession begins on bare rock after glaciers have passed or on newly formed volcanic islands?

The type of succession that begins on bare rock after glaciers have passed or on newly formed volcanic islands is called primary succession. This process starts with the colonization of pioneer species, such as lichens and mosses, which can survive in harsh conditions and help to create soil. Over time, as organic matter accumulates, more complex plant species can establish, leading to greater biodiversity and the development of a mature ecosystem.

Materials bulldozed at the front of the glacier form a what?

Materials bulldozed at the front of a glacier form a feature known as a moraine. Moraines are accumulations of debris, such as rocks and soil, that have been transported and deposited by the glacier as it moves. They can vary in size and shape, often creating ridges or mounds that mark the glacier's former extent. These features are important indicators of past glacial activity and landscape evolution.

Did dinosaurs drink from springs fed by glaciers?

Well, isn't that a fascinating thought! Dinosaurs roamed the Earth millions of years ago, and they probably drank from various sources like rivers, lakes, and even rainwater. While some areas may have had springs fed by glaciers during the time of the dinosaurs, it's hard to say for sure without direct evidence. Just imagine those gentle giants taking a sip from a cool, refreshing spring - what a peaceful image to ponder!

What is the difference between morraine and scree?

Oh, dude, it's like this - moraine is basically a fancy word for a ridge or sediment left behind by a glacier, while scree is just a bunch of loose rocks and debris that have fallen down a slope. So, like, moraine is more structured and organized, while scree is just a hot mess of rocks chilling on a hillside. Hope that clears things up for ya!

Why are glaciers the most erosive force in nature?

Glaciers are the most erosive force in nature due to their ability to transport vast amounts of rock and sediment across the landscape as they move. The immense weight and pressure exerted by glaciers can pluck, scrape, and grind rocks, creating deep valleys, sharp peaks, and U-shaped valleys. Additionally, the meltwater from glaciers can further erode the land by carrying sediment and debris downstream, shaping the landscape over time.

What are the pros of living near glaciers?

Living near glaciers can provide access to a valuable source of freshwater, as glaciers store a significant amount of the world's freshwater resources. Glaciers also contribute to unique ecosystems and biodiversity, supporting a variety of plant and animal species. Additionally, glaciers can attract tourists and researchers, boosting local economies and providing opportunities for scientific study and exploration.

What is the process of weathered rock and soil being moved by wind water waves or glaciers?

The process of weathered rock and soil being moved by wind, water, waves, or glaciers is known as erosion. Erosion occurs when these natural forces transport sediments from one location to another, often reshaping landscapes in the process. For example, wind can lift and carry fine particles, while water can wash sediments away during rainfall or river flow. Glaciers, on the other hand, can pick up large boulders and move them over long distances as they advance and retreat.

What does a supernova leave behind in its aftermath?

Well, friend, when a supernova happens, it leaves behind a wonderfully unique and powerful remnant called a neutron star or a black hole. These objects continue to inspire and teach us about the incredible forces at work in the universe. Just like how every painting holds a new surprise, every supernova aftermath is a breathtaking sight to behold.

What happens to the ground underneath a glacier as it moves and melts?

As a glacier moves and melts, the ground underneath it can become smoothed and shaped by the pressure and movement of the ice. This process is known as glacial erosion, and it can create features like valleys, ridges, and lakes. Additionally, as the glacier melts, it can deposit sediment and rocks, forming landforms like moraines and eskers.

How did the ice age isolate human population of the Americas from that of Asia?

It was the end of the last glaciation which isolated humans in the Americas from the rest of the world.

During the latter part of the glaciation, people were able to enter the Americas from Asia because of the lowered sea levels. As the ice melted, the sea levels rose turning an area of land into a number of islands separated by sea. This effectively prevented more people from moving into the Americas until Inuit were later able to travel across from Siberia after the great thicknesses of ice had disappeared.

What is the galloping glacier?

A galloping glacier is a glacier that, unlike others of their type which move at inches per day, shoots ahead feet per day, an astonishing rate for glaciers. The nickname "the galloping glacier" has also been given to an Alaskan black rapids glacier which set a record for its speed. Galloping glaciers are most likely caused by extra melted snow lubricating the glacier.

What situation allows a glaciers size to be maintained?

a glacier has a snowline at the same height as the wastage line.

What is evidence that a glaciers was at?

Presence of glacial striations, moraines, and glacial valleys are evidence that a glacier was there. These features are formed by the movement and deposition of ice, rocks, and sediment as the glacier advances and retreats. Additionally, erratic boulders, cirques, and U-shaped valleys are also typical evidence of past glacial activity.

Which of the followiing were created by glaciers in north america?

Some of the features created by glaciers in North America include the Great Lakes, Niagara Falls, Yosemite Valley, and the Finger Lakes in New York. These features were formed through the process of glaciation during the last Ice Age.

How do you drive from Seattle to Glacier national park?

The approximate driving time and mileage information -

Between: Seattle, WA

and: Glacier National Park, MT

Driving miles: 550

Driving time: 8 hrs 45 mins

- is based on traveling non-stop in good driving conditions. Driving time does not take into consideration conditions which may extend travel time such as weather, road work, border crossings, and rush hour traffic in urban areas. Mileage denotes actual road miles covered as opposed to Point A to Point B linear distances on a map.